Answer:
![\huge\boxed{(D)\ \$ 437.50}](https://img.qammunity.org/2021/formulas/mathematics/high-school/gm0fep6o62xqgbziqinght40a3dlvsg131.png)
Explanation:
If you receive 8% of the total sales, and you earned $35 today, this means that $35 is 8% of the total sales.
We can find the total sales by setting up a percentage proportion.
![(35)/(x) = (8)/(100)](https://img.qammunity.org/2021/formulas/mathematics/high-school/xuvkpuhw1jktj1i4ib2kwv5o47xr39fabb.png)
To find the value of x (total cost), we can cross multiply.
![35 \cdot 100 = 3500\\\\3500 / 8 = 437.50](https://img.qammunity.org/2021/formulas/mathematics/high-school/6ghkr8j00mf983zwochzoe3plos0va4sz6.png)
Hope this helped!